A third-degree burn is the most serious type of burn, as it involves all layers of skin and can severely damage muscle and tissue. Skin grafting is necessary to provide a protective layer for the burned area so that it is able to heal. It acts as a protective barrier so that bacteria isn't able to infect the burned portion of skin and reduces the course of treatment needed.
What organisms are you talking about
*Answer*: C.Bone marrow
*Explanation*: In the human adult, the bone marrow produces all of the red blood cells, 60–70 percent of the white cells (i.e., the granulocytes), and all of the platelets.
Why the answer not A,B&D:
The lymphatic tissues, particularly the thymus, the spleen, and the lymph nodes, produce the lymphocytes (comprising 20–30 percent of the white cells). The reticuloendothelial tissues of the spleen, liver, lymph nodes, and other organs produce the monocytes (4–8 percent of the white cells). The platelets, which are small cellular fragments rather than complete cells, are formed from bits of the cytoplasm of the giant cells (megakaryocytes) of the bone marrow.
Humans even though i dont believe in evolution but that is the scientific answer